Brake-testing mechanism



De@ i8 i923. 3947196@ c. B. HUTCHISON BRAKE TESTING MEGHANISM Filed Feb. 28. 1921 Patented Dec. 18, 1923.

narran; sraras CHARLES BT. HUTCHISON, OF KANSAS CITY, KNSAS.

BRAKE-TESTING MECHANISM.

Application liled February 28, 1921. Serial llo. 442,421.

To all 'whom t 'may comem:

Be it known that l, CHARLES B. HU'roHI- soN a citizen of the United States, residing at liansas Cit in the county of Wyandotte and State of l ansas, have invented a certain new and useful improvement in Brake-Testing Mechanisms, of which the following is a speciication.

My invention relates to improvements in brake testing mechanism;

The object, of my invention is to provide novel means for testing car brake mechanisms in their assembled operative positions on cars, which is simple in construction,.

cheap to make, durable, not liable to getout of order which is 'eilicient in operation, and with which the brake operating mechanisms of cars on different tracks may be readily tested as to strength.

The novel features of my invention are hereinafter fully described and claimed..

In the accompanying y drawing, which illustrates the preferred embodiment of my invention,

Fig. ls a plan view, partly broken away, of my improved testing mechanism shown ap lied on separate tracks.

ig. 2 is a view partly in vertical section, partly in side elevation and partly broken awayof my improved testing mechanism, shown on an enlarged scale.

Fig. 3 is a vertical sectional view on the line 3-3 -of Fi 2. Y

Fig. 4 is an en arged to view of the pressure cylinder and some o the par'tsconnected therewith.

Similar reference characters designate similar parts in the diiferent views.

1 desi ates a ressure cylinder having connecte with it a pipe 2, adapted to he connected with an air pressure tank or with an air pump, not shown. The pipe 2 may have a shut o cock 3. Connected to the pi 2 is a pressure indicator 4.

eciprocative in the cylinder 1 is a piston 5' having a piston rod 6 at the end of the piston which is distant from the pipe 2.

A transverse horizontal member 7 is pivoted at its center by a vertical pin 8 to the outer end of the piston rod 6.

The pressure cylinder 1 is mounted, preferably revolubly, on a fixed anchorin means, comprising a late 9 through whc extends bolts 10 provlded with nuts 11 and embedded in a concrete body 12. The plate` 9 is provided with a vertical standard 13 having a spherical head 14 revolubly tted in a. socket provided in the lower side of the cylinder 1.

A vertical bolt 15 extends through' a slot 16 in thelower side of the cylinder 1, and through the standard13 The head of the bolt 15 is mounted in a recess 17 provided in the cylinder 1. A. nut 18 is mounted on the bolt 15 and bears against the under side of the plate 9.

By means of this construction, the cylinder 1 may have a limited universal movement, on the standard 13.

The end of the cylinder 1, which is opposite tothe end throu h which extends the piston rod 6, is provi ed with a bracket. 19, to which is pivoted at its middle portion a horizontal transverse bar 20 having revolubly mounted on it adjacent -to its respective ends two pulleys 21.

Referring to Fig. 1, 22 designates an operating lever of an ordinary brake operating mechanism carried by a car 23. 'llhe lever 22 has connected to it the ordinary chain 24 which is connected with the usual brake wheel staff. In this type of brake operating mechanism, the lever r22 is also connected with and operated by a piston rod 25 mounted in the usual air pressure cylinder 26. l

`or testing the brake o rating mechanism just described, I provi e dexihle means v arranged to be connected to the chain 24: and

so connected .with the member 7 that an additonal strain may be applied to the lever 22 after the latter has been operated to fully apply the brakes. rlhiss Hexible means comprises preferably the following described arts; p 27 ydesignates a cable having attached to it at one Aend a hook 28 adapted toreleasably engage the chain 2t. The other end of the cable- 27 has attached to it a hook 29 adapted to releasably engage a chain 3d which is attached to a cable 31' engaging the' pulley 21 and having its ends respectively attached to the member 7 at opposite sides respectively of thepiston rod The plate 9 is anchored ad1acent to one of a plurality of tracks 32, 33 and 34e, which aredisposed parallel with one another.

For testing the brakes of a car 23 which is on the track 32, the cylinder l is turned to the position shown in dotted lines in Fig. 1, and the hook 28 is attached to the brake chain 24: of the adjacent car.

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The brakes on this car are then set with the usual air operated mechanism provided on the car and with a 'predetermined ressure, which is the maximum pressure a 0rded by the air supply on the car. The shut olf cock 3 is then opened to permit air under pressure to enter the cylinder 1 from the pipe 2. The air ressure in the cylinder 1 lwill force outwardly the piston rod 6, thereb exerting a pulling braking strain on the e c ain '24 through the intermediacy of the member 7, cable 31, chain 30, hook 29, cable 27 and hook 28. The introduction of air into the cylinder 1 is continued until the indicator 4 indicates that required additional braking ressure has been applied to the chain 24. lfthe operatingmechanism thus tested stands up to the strain which has been thus applied to it, the mechanism is deemed vto be 1n perfect working condition. If the testing strain applied causes a breakage of any part of the brake operat- (part must, of course, and the parts given inder 1 through the pipe 2, the cock 36 isy v closed. After a test, the cock 3 is closedand the cock 36 opened.

In order that the brakes of a car on the track 33 may be tested, the cylinder 1 is turned to the position shown in'solid lines in Figs. 1 and 2, and the cableA 27 is run over two pulleys 37 and 38 mounted respectively .in two pulley blocks 39 and 40 respectively` attached to two chains 41 and 42, which are fastened respectively to pins 43 and 44 disposed respectively ad'acent to the ends of the tracks 32 and 33. en the parts are S0 connected and` air is admittedto the cylinder 1, the chain 24 of the car on the'track 33 Willbepulled by the cable 27 so as to apply to the chain the testing pressure, the normal working pressure 'having been previously ap lied thereto in the ordinary manner.

n vorder that the brakes o acar on the more distant track 34 may be tested, there maybe provided a cable 45 corresponding to the cable 27 and having attached to its respective ends hooks 46 and 47 adapted to respectively engage a brake chain 24 and the 'chain`30. The cable 45 is run over a pulley 48, mounted in the pulley block 39 and over a pulley 49 mounted in a pulley block 50- whichvis attached to a chain 51, which in oi universal joint on the standard 13`per mits the cylinder to adapt itself to be swung to the two positions shown in Fig. 1, and to cars in which the chains 24 are of different heights when the cars are on the track 32.

' I do not limit my invention to the structure shown and described, as. many modifications, within the sco e of the appended claims may be made wit out departing from Ithe s irit of my invention.

W at I claim is- 1. In a brake testing mechanism, a lixed anchoring means, liexlble means arranged for releasable attachment to a movable part of a car brake operating means, and means revoluble on a vertical axis on said anchoring means by which a pulling s train may be applied'to said movable part, substantially as set forth.

2. In a brake testing mechanism, a fixed anchoring means,a pressure cylinder revoluble thereon on a vertical axis, a piston reciprocative 'in saidcylinder, and means ac# tuatedv by said piston and arranged for releasable attachment to a movable part of a car brake operating mechanism by which a pulling strain may be applied to said part, substantially as set `forth.

y 3. In a brake testing mechanism, a fixed anchoring means, a pressure -cylinder revoluble thereon on a vertical axis, a piston reciprocative in said cylinder, and flexible means actuated by the piston and arranged for releasable attachment to a movable part of a car brake operating mechanism by which a pulling strain may be applied to said Part, substantially as set forth.

4. In a brake testing mechanism, a pressure cylinder, a piston reciprocative therein having a piston rod, a transverse member carried by said piston rod, and a iexible member having means for releasable attachment to a movable part of a car brake mech- 5. In a brake testing mechanism, a support, a. pressure cylinder revoluble thereon, a piston reclprocative 1n said cylinder having apiston rod, a transverse member carried by said piston rod, and flexible means arranged for releasable attachment to a .movable part of a car brake operating mechanism and having two branches attached re- 147mm v i spectivel to said transverse member ai', o means of which a braking strain ma he ap- 1i@ posite si' es of said piston rod, substantial y plied to said brake operating mec ansms as set' fortl1.` additional tothe strain normally applied to. s. 6. ln a brake testin mechanism, the comsaid brake operating mechanisms in their bination with a, plura ity of tracks, of 'presordinary operation, substantially as set sure operated means, and means adapted to forth. be connected. with said pressure operated 'In testimony whereof ll have signed my means and with the brake operating mechaname lio thsecication. vI lsrzns respectively of' cars on saidA tracks, by C BLE@ B. lHllU'llClli-LKSN. 

